and as we said the fire at the john f. kennedy library is being investigated as related but officials can't confirm they are related. you see right there the map of the area this occurred. right near the finish line of the boston marathon separated the john f. kennedy library is closer to the river there in boston. we want to go back to that moment and show you that video. police have been calling for all video to be sent in right now of the explosions. there was the first explosion right near the finish line of the boston marathon. and as you listen for it a few seconds later an explosion with huge concussive power. immediately you had officials rushing in to begin their response. that was the scene shortly before 3:00. i want to go now to one of the hospitals in the boston area. ron, can you help me out and tell me exactly where you are? >> yes. level one trauma center not too far from the finish line in boston. >> and what is the scene there right now? and do you have any sense of how many people are being treated? >> w